With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cnatAddrPortBindEntry
cnat Address Port Bind Entry
1.3.6.1.4.1.9.10.77.1.2.4.1
Each entry in the this table holds information a NAPT BIND that is currently active.
Back to CISCO-IETF-NAT-MIB MIB page.
IPHost Network monitor allows you to monitor cnatAddrPortBindEntry on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco mobile switches right now.